You can look at https://joinmastodon.org/servers and then Region and see which servers are interesting for you. Besides that if you follow a lot of persons which use your language and have similar interests your local timeline can be better for you. And you can follow hashtags like for example #gardening #flowers #birds
Apart from this, the Explore option on Mastodon, no matter which servers I’ve tried very often is full of US content, but there’s no need to use the Explore when your local timeline is interesting.
👏 Fireworks! 🎆